(1)若a-2b=3,则a+2-2b=?(2)若2a-b+4=5,则4a-(2b+3)=?

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(1)若a-2b=3,则a+2-2b=?(2)若2a-b+4=5,则4a-(2b+3)=?

(1)若a-2b=3,则a+2-2b=?(2)若2a-b+4=5,则4a-(2b+3)=?
(1)若a-2b=3,则a+2-2b=?(2)若2a-b+4=5,则4a-(2b+3)=?

(1)若a-2b=3,则a+2-2b=?(2)若2a-b+4=5,则4a-(2b+3)=?
(1)a+2-2b=a-2b+2=3+2=5
(2)
4a-(2b+3)=4a-2b-3
=2(2a-b)-3
=2×(5-4)-3
=2-3
=-1

1、
a+2-2b
=a-2b+2
=3+2
=5

2、
4a-(2b+3)
=4a-2b-3
=2(2a-b+4)-8-3
=2*5-8-3
=1